CN111589740B

CN111589740B - A scraper

Info

Publication number: CN111589740B
Application number: CN201910127875.0A
Authority: CN
Inventors: 李跃明
Original assignee: Hangzhou Lianhe Tool Manufacturing Co ltd; Hangzhou Great Star Industrial Co Ltd
Current assignee: Hangzhou Lianhe Tool Manufacturing Co ltd; Hangzhou Great Star Industrial Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2025-03-21
Anticipated expiration: 2039-02-20
Also published as: CN111589740A

Abstract

The present invention discloses a scraper, wherein the blade has at least one cutting edge, at least one of the cutting edges is a multi-arc cutting edge, and the multi-arc cutting edge is a cutting edge with a variable diameter. The present invention designs the cutting edge of the blade to be a multi-arc cutting edge, thereby overcoming the problem that the plane cutting edge in the prior art cannot be operated in uneven places, and the design of the multi-arc cutting edge broadens the application range of the single arc cutting edge, thereby achieving a better cleaning effect.

Description

Scraper knife

Technical Field

The invention relates to the field of mechanical manufacturing tools, in particular to a scraper.

Background

The common scraper is provided with a plane edge, so that the cleaning effect is poor for places with uneven surfaces when cleaning dirt on the surfaces of equipment. In addition, with the increase of the number of uses, the cutting edge of the blade is worn, and the blade is often required to be replaced. However, the blades of existing taping knives are connected to the handle by a hold-down bar, most of which require the hold-down bar to be removed entirely in order to rotate or replace the blade, which undoubtedly adds to the complexity.

Accordingly, those skilled in the art have been directed to developing a cleaning tool that is capable of quickly replacing the blade and is suitable for use on uneven surfaces.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention is directed to a method for replacing a blade without completely removing a pressing bar and cleaning an uneven surface.

In order to achieve the above object, the present invention provides a doctor blade, which includes a blade, the blade has at least one cutting edge, and at least one multi-arc cutting edge is provided in the cutting edge.

Further, the multi-arc cutting edge is a cutting edge with a variable diameter.

Further, the multi-arc cutting edge is a double-arc cutting edge.

Further, at least one of the cutting edges is a planar cutting edge.

Further, the main body of the blade is polygonal, and each side is provided with a cutting edge.

Further, wherein the polygon is a triangle, a quadrangle, or a pentagon.

Further, including handle, hold-down bar, the blade includes the dismantlement hole, and the first end of hold-down bar can deviate from in the dismantlement hole for the blade can be dismantled.

Further, the blade includes a plurality of locating holes, and the handle includes a projection that mates with the locating holes, the blade being configured to mate with the projection on the handle through the locating holes to secure to the handle.

Further, the device comprises an actuating part and an elastic piece, wherein the first end of the pressing rod presses the blade on the handle, the second end of the pressing rod is connected with the actuating part, the actuating part can drive the pressing rod to move in the axial direction of the pressing rod, and the elastic piece is used for applying elastic restoring force to the blade so that the blade can move along with the first end of the pressing rod.

Further, the second end of the pressing rod is in threaded connection with the actuating part, and the pressing rod can be driven to move in the axial direction of the pressing rod.

Further, the device comprises a limiting piece, the limiting piece is sleeved at the second end of the compression rod, a fixing structure matched with the limiting piece is arranged in the actuating part, and an actuating stroke is arranged between the limiting piece and the fixing structure.

Further, an elastic device is arranged between the actuating part and the handle, the elastic device is sleeved on the pressing rod, and the elastic device is arranged to apply elastic restoring force to the actuating part and can drive the pressing rod to move in the axial direction of the pressing rod.

Further, including the screens cover, the screens cover is established on compressing tightly the pole, and the elastic component is arranged in the screens cover, and the elastic component is set up to apply elasticity restoring force to the screens cover for the screens cover promotes the blade and moves along with compressing tightly the first end of pole. The clamping sleeve is provided with a convex rib, a clamping groove is arranged in the handle, and the convex rib is matched with the clamping groove to prevent the clamping sleeve from falling off from the handle.

The invention designs the cutting edge of the blade into a multi-arc-section cutting edge, solves the problem that the plane cutting edge cannot operate at uneven places in the prior art, widens the application range of the single-arc-surface cutting edge by the design of the multi-arc-section cutting edge, and ensures better cleaning effect.

The existing scraper is time-consuming and labor-consuming when replacing the blade, and the compression rod is required to be completely taken out, the blade can drop from the handle when being replaced due to the existence of the elastic piece, and the blade can be replaced without completely taking out the compression rod when replacing the blade due to the design of the limiting piece, so that the blade is convenient to use;

the convex rib of the clamping sleeve is matched with the clamping groove in the through hole, so that the clamping sleeve can be prevented from falling out of the handle.

The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.

Drawings

FIG. 1 is a schematic view of a blade according to a preferred embodiment of the present invention;

FIG. 2 is a schematic illustration of the placement of the multi-arc segment edge and the planar edge in accordance with a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a schematic doctor blade of a polygonal blade in accordance with a preferred embodiment of the invention;

FIG. 4 is a schematic view of the doctor blade of a preferred embodiment of the invention;

FIG. 5 is an exploded view of a doctor blade of a preferred embodiment of the invention;

FIG. 6 is a cross-sectional view of a doctor blade of a preferred embodiment of the invention;

FIG. 7 is a schematic view of a clip spring replacement retaining sleeve according to a preferred embodiment of the present invention;

FIG. 8 is a cross-sectional view of a clip spring replacement retaining sleeve according to a preferred embodiment of the present invention;

FIG. 9 is a schematic view of a positioning sleeve according to a preferred embodiment of the present invention;

FIG. 10 is a schematic view of a detent sleeve according to another preferred embodiment of the present invention;

FIG. 11 is a schematic view of the engagement of the detent sleeve with the through hole according to another preferred embodiment of the present invention.

100-Scraper, 101-screw, 102-blade, 10201-water drop hole, 10202-locating hole, 10203-planar cutting edge, 10204-multi-arc cutting edge, 103-handle, 10301-through hole, 10302-clamping groove, 10303-sliding groove, 10304-bump, 104-actuating part, 10401-buckle, 105-shaft sleeve, 106-fixed sleeve, 10601-fixed sleeve mounting preformed hole, 107-actuating stroke, 208 and 108-clamping sleeve, 10801-convex rib, 109-spring piece, 1010-gasket, 206-clamping spring, 20601-clamping spring mounting preformed hole.

Detailed Description

The following description of the preferred embodiments of the present invention refers to the accompanying drawings, which make the technical contents thereof more clear and easy to understand. The present invention may be embodied in many different forms of embodiments and the scope of the present invention is not limited to only the embodiments described herein.

In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thickness of each component shown in the drawings are arbitrarily shown, and the present invention is not limited to the dimensions and thickness of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration. The "second end" and "upper end" as used herein are the ends that are distal from the blade, the "first end" and "lower end" are the ends that are proximal to the blade, the "upward movement" refers to the movement of the second end of the hold-down bar toward the second end of the actuator, and the "downward movement" refers to the movement of the second end of the hold-down bar away from the second end of the actuator.

As shown in fig. 1-3, the blade 102 has at least one cutting edge, which is curved with respect to the body of the blade 102, and at least one of the cutting edges is a multi-arc cutting edge, which is a variable diameter cutting edge. Referring to fig. 2 and 3, the cutting edge of blade 102 is provided with a pair of planar cutting edges 10203 and a pair of multi-arc cutting edges 10204. The planar cutting edge 10203 is disposed opposite to the multi-arc cutting edge 10204 (see fig. 2 a) or adjacent thereto (see fig. 2 b). The orientation of the pair of planar cutting edges 10203 is opposite to the orientation of the pair of multi-arc segment cutting edges 10204 relative to the body of the blade 102. The blade 102 has 3 positioning holes 10202 and 1 water drop hole 10201,3 positioning holes 10202, which cooperate with the protrusions 10304 on the handle 103, respectively, to secure the blade 102 to the handle 103. The first mounting hole of the drip hole 10201 can enable the screw 101 to be mounted on the blade 102, and the second mounting hole cooperates with the protrusion 10304 on the handle 103 to fix the blade 102 to the handle 103. The number of the positioning holes 10202 is not limited to 3. It should be appreciated that for purposes of increasing the variety of angles of the blade 102, the blade 102 is not limited to a quadrilateral configuration, but may be configured as a polygon such as a triangle, pentagon, etc., each side having a cutting edge, and the orientations of the cutting edges may be opposite or identical, as shown in fig. 3.

In one embodiment according to the invention shown in fig. 4-6, 100 is a doctor blade. Screw 101 is threaded through water drop hole 10201 in blade 102 and through handle 103 to bushing 105 in actuator 104. Here, the boss 105 is fitted and fixed to the actuator 104. Similarly, the actuator 104 may be directly threadedly coupled to the screw 101. Here, the screw 101 is a pressing rod. Similarly, the hold down bar may be a bolt or stud. The fixing sleeve 106 is sleeved on the second end of the screw 101 through a fixing sleeve mounting preformed hole 10601. Here the retaining sleeve 106 is a stop. An actuating stroke 107 is provided between the fixed sleeve 106 and the sleeve 105, see fig. 6. The actuating portion 104 is screwed and drives the sleeve 105 to rotate relative to the screw 101. When the screw 101 is moved down until the blade 102 can be rotated or removed, the lower end of the fixing sleeve 106 contacts the fixing structure, thereby preventing the screw 101 from falling off the handle 103. When the screw 101 is moved up until the blade 102 is fixed to the handle 103, an actuating stroke 107 is provided between the lower end of the fixing sleeve 106 and the fixing structure, in which the actuating portion 104 is screwed. When the screw 101 is moved up until the blade 102 is fixed to the handle 103, the elastic member 109 is in a compressed state. When the screw 101 is moved down until the blade 102 can be rotated or removed, the elastic member 109 applies an elastic restoring force to the blade 102, thereby pushing the blade 102 to be detached from the handle.

Similarly, the snap spring 206 replaces the fixed sleeve 106. The snap spring 206 is fitted over the second end of the screw 101 via a snap spring mounting preformed hole 20601, see fig. 7 and 8.

In other embodiments, a pressing structure is used instead of a structure that creates a threaded connection. An elastic device is arranged between the actuating part 104 and the handle 103, and the elastic device is sleeved on the pressing rod 101. Pressing the actuating portion 104 causes the hold-down bar 101 to move downward, with the resilient means in a compressed state. When the blade 102 rotates or is installed, the elastic device applies elastic restoring force to the actuating portion 104 to drive the pressing rod 101 to move upwards.

The lower end of the actuating portion 104 has a catch 10401, and the actuating portion 104 is inserted into the through hole 10301 of the handle 103, and then the elastic arm of the catch 10401 is deformed and pressed into the through hole 10301 of the handle 103. The clasp 10401 is designed to strengthen the connection of the actuator 104 and the handle 103. The principle of connection between the actuating portion 104 and the handle 103 in the present invention is that the screw 101 penetrates through the through hole 10301 of the handle 103 and is directly or indirectly connected to the actuating portion 104.

As shown in fig. 9 and 10, the detent sleeve 208 is disposed in the through hole 10301 of the handle 103. The clamping sleeve 208 is sleeved on the screw 101. The elastic member 109 is disposed in the detent sleeve 208. The second end of the elastic member 109 is fixedly coupled to the handle 103 or the washer 1010. Here, the washer 1010 is located between the handle 103 and the elastic member 109. The lower end of the elastic member 109 contacts the bottom of the click sleeve 208. The bottom of the detent pocket 208 is in direct contact with the blade 102. The clamping sleeve 208 pushes the blade 102 to drop off from the handle 103 under the elastic restoring force of the elastic piece 109. Preferably, as shown in fig. 10 and 11, the inner wall of the through hole 10301 of the handle 103 is provided with a clamping groove 10302 and a sliding groove 10303. The detent pocket 108 is disposed within the through hole 10301. The detents 10302 cooperate with ribs 10801 on the detent sleeve 108 to prevent the detent sleeve 108 from falling out of the detent with the blade 102 when the blade 102 is pushed by the detent sleeve. The detent sleeve 108 slides in the slide 10303. The screw 101 penetrates the retaining sleeve 108 and the elastic member 109. When the screw 101 is moved up until the blade 102 is fixed to the handle 103, the elastic member 109 is in a compressed state. When the screw 101 moves down until the blade 102 can be rotated or removed, the elastic member 109 generates a pushing force on the blade 102 by using an elastic restoring force, so that the clamping sleeve 108 pushes the blade 102 to drop from the clamping position, and thus the blade 102 can be easily rotated or replaced.

In other embodiments, the lower end of the spring 109 is in direct contact with the blade.

It is to be noted that the outer diameter of the first end of the screw 101 is larger than the aperture of the first mounting hole and smaller than the aperture of the second mounting hole of the water drop hole 10201. When the actuating portion 104 is screwed or pressed, the screw 101 is prevented from falling off the handle 103 due to the existence of the stopper. At this time, the latch sleeve 108 is pushed by the elastic restoring force to pull the blade 102 off the latch. If the cutting edge needs to be exchanged, the blade 102 is rotated by an appropriate angle around the screw 101 as an axis to exchange the cutting edge. If it is desired to replace the blade, pulling the blade 102 moves the screw 101 from the first mounting hole to the second mounting hole of the drip hole 10201. At this point, the blade 102 is removed and flipped over to use the other side edge or replaced with a new blade. When the blade 102 is mounted, the second mounting hole of the water drop hole 10201 is sleeved outside the screw 101, and the blade 102 is pulled to move the screw 101 from the second mounting hole of the water drop hole 10201 to the first mounting hole of the water drop hole 10201. Screwing or pressing the actuator 104 causes the screw 101 to move up to the point where the blade 102 is secured to the handle 103 for ease of use.

In other embodiments, the screw 101 is replaced with a bolt or stud, and a nut is used as the mating member. The outer diameter of the nut is larger than the aperture of the first mounting hole and smaller than the aperture of the second mounting hole of the water drop hole 10201.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. A scraper, characterized in that it comprises a blade, a handle, a pressing rod, an actuating portion, an elastic member, a limiting member and a positioning sleeve, wherein the blade has at least one cutting edge, and the cutting edge has at least one multi-arc cutting edge;

The main body of the blade is polygonal, and each side is provided with the cutting edge;

The cutting edge is bent relative to the body of the blade;

The blade comprises a disassembly hole and a plurality of positioning holes, the first end of the pressing rod can be disengaged from the disassembly hole, so that the blade can be disassembled; the disassembly hole is a water drop hole, the water drop hole comprises a first mounting hole and a second mounting hole, the plurality of positioning holes are configured to respectively cooperate with the protrusions on the handle to realize the fixing of the blade to the handle; the first mounting hole of the water drop hole is configured to enable the pressing rod to be installed on the blade, and the second mounting hole is configured to cooperate with the protrusion on the handle to realize the fixing of the blade to the handle; the blade is configured to be able to rotate an appropriate angle with the pressing rod as the axis to exchange the cutting edge;

The first end of the clamping rod presses the blade onto the handle, and the second end of the clamping rod is connected to the actuating portion; the actuating portion can drive the clamping rod to move in the axial direction of the clamping rod, and the elastic member is configured to apply an elastic restoring force to the blade, so that the blade can move with the first end of the clamping rod;

The second end of the clamping rod is threadedly connected to the actuating portion, and can drive the clamping rod to move in the axial direction of the clamping rod;

The limiting member is sleeved on the second end of the pressing rod, a fixing structure cooperating with the limiting member is arranged in the actuating portion, and an actuating stroke is provided between the limiting member and the fixing structure;

The locking sleeve is arranged on the clamping rod, the elastic member is placed in the locking sleeve, the lower end of the elastic member is in contact with the bottom of the locking sleeve, the bottom of the locking sleeve is in direct contact with the blade, and the elastic member is configured to apply the elastic restoring force to the locking sleeve so that the locking sleeve pushes the blade to move along with the first end of the clamping rod; the locking sleeve is provided with a convex rib, and a clamping groove is provided in the handle, and the convex rib cooperates with the clamping groove to prevent the locking sleeve from falling off the handle.

2. The scraper as claimed in claim 1, wherein the multi-arc segment cutting edge is a cutting edge with a variable diameter.

3. The scraper as claimed in claim 1, wherein the multi-arc-segment cutting edge is a double-arc-segment cutting edge.

4. The scraper according to claim 1, wherein at least one of the cutting edges is a planar cutting edge.

The scraper according to claim 1 , wherein the polygon is a triangle, a quadrilateral or a pentagon.

6. A scraper, characterized in that it comprises a blade, a handle, a pressing rod, an actuating portion, an elastic member, a limiting member and a positioning sleeve, wherein the blade has at least one cutting edge, and the cutting edge has at least one multi-arc cutting edge;

The cutting edge is bent relative to the body of the blade;

An elastic device is provided between the actuating portion and the handle, the elastic device is sleeved on the clamping rod, and the elastic device is configured to apply an elastic restoring force to the actuating portion, so as to drive the clamping rod to move in the axial direction of the clamping rod;